Overview
What Is A Raymond Mill
The Raymond mill, or pendulum roller mill, is a vertical, air-swept grinding machine that reduces minerals to powder between suspended rollers and a stationary grinding ring. Rollers hang from a central spider and swing outward as the main shaft rotates, pressing against the ring under centrifugal force. A shovel lifts feed from the mill floor into the gap, where compression and friction reduce the particles. It is one of the most common mills for fine powder in small and medium-sized plants because it forms a complete, self-contained grinding system on a small footprint.
Where It Is Used
Raymond mill serves mining, construction, chemicals, metallurgy, refractories, pharmaceuticals and cement, and handles more than two hundred non-flammable materials such as barite, calcite, feldspar, talc, marble, limestone, clay and glass. The finished fineness is typically set between 80 and 325 mesh and changed through the classifier speed rather than by swapping equipment.
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Working principle
Grinding Between Roller and Ring
Feed is delivered evenly and continuously into the grinding chamber. As the shaft turns, centrifugal force swings the rollers outward and presses them onto the ring. The shovel carries material into the space between the roller and ring, and the rolling action of the roller grinds it against the ring surface.
Air Classification and Collection
Air from the blower lifts the ground powder toward the classifier. Coarse particles fail to pass and fall back for regrinding, while the fine fraction travels with the airflow into the cyclone collector and leaves through the discharge pipe as finished product. Because feed always carries some moisture, heat inside the chamber evaporates it, and the slight increase in circulating air is drawn through a dust collector and discharged clean, keeping the system under negative pressure.
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Features & Benefits
1. Compact vertical layout. One unit runs the whole process from feed to finished powder on a small footprint.
2. Even, adjustable fineness. The classifier holds a consistent cut point with a high passing rate.
3. Reliable transmission. Enclosed gears and pulleys run smoothly with straightforward maintenance.
4. Quality wear parts. Structural parts use qualified steel and grinding components use high-grade wear material.
5. Centralized control. The electrical system needs minimal operator attention during running.
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Specifications
Model 3R2115 3R2615 3R2715 3R3015 4R3016 4R3216 Grinding Roller Number(pcs) 3 3 3 3 4 4 Diameter mm) 210 260 270 300 300 320 Height(mm) 150 150 150 150 160 160 Grinding Ring Diameter(mm) 726 865 884 965 990 1073 Height(mm) 150 150 150 150 160 160 Feeding Size(mm) <15 <15 <15 <15 <20 <25 Output Size(mm) 0.613-0.044 0.613-0.044 0.613-0.044 0.613-0.044 0.613-0.044 0.613-0.044 Capacity(t/h) 0.28-1.8 0.35-2.8 0.40-3.4 0.45-3.7 0.6-4.5 1.0-5.2 Motor Power(kw) 28.2 35.7 42.7 55 55 72.5 -
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